It's a bit early for 11.12, but how about Catalyst 11.11c?

AMD has pushed out a third performance driver built off of their Catalyst 11.11 driver build. In this release you get all of the improvements from both 11a and 11b, along with new improved CrossfireX performance in Skyrim. If you have skipped the two previous updates it is probably worth grabbing this release if you are having any performance issues with the games listed below.

Elder Scrolls Skyrim

New in Catalyst 11.11c: Delivers AMD CrossfireX performance scaling for the AMD Radeon HD 5000 Series